Title

The Application of Some Nonlinear Techniques for the Improvement of Aircraft Beam Following

Date

1953

Index Abstract

Coming Soon

Photo Quality

Undetermined

Report Number

WADC TR 53-74

Creator

Markusen, David L.

Norton, John S.

Pomeroy, Orville P.

Corporate Author

Honeywell, Inc.

Extent

38

NTRL Accession Number

AD020378

Identifier

AD0020378

Access Rights

Unknown

Distribution Classification

1

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

AFAL LTR

Distribution Change Action Date

1/1/1900

Abstract

The beam-following study was devoted to bracketing improvement and noise reduction. Nonlinear systems in the bracketing-improvement study were investigated in which: (1) the system gain was a nonlinear function of the coupler output, (2) the time constant of the lead network was a function of the distance from the localizer transmitter, and (3) a beam position sensor automatically engaged at the moment the rate signal became larger than the displacement signal. Typical REAC solutions are included. A perception filter characterized as a low-pass filter with a variable cut-off frequency and a controlled limit on the second-derivative of the output was developed in the nonlinear program for minimizing beam-noise effects on the ILS-A/P-A/C control system. Data taken on the REAC are presented as evidence that the performance of passive (RC) integrators in a second-order low-pass filter with limiting on the second derivative of the output is similar to corresponding portion of the perception filter.

Report Availability

Not available via Contrails

Date Issued

1953-02

Index In

DTIC

Type

report